mn giai giup em bai 3
Mn giai bai nay giup em a
mn giai giup mik bai bai nay vs
Mn giai giup bai 10 với
Bài 10:
\(=4,2\times100,21-0,21\times\left(2,3+1,9\right)\\ =4,2\times100,21-0,21\times4,2\\ =4,2\times\left(100,21-0,21\right)=4,2\times100=420\)
Tick mình nha <3
Bài 10:
=4,2×100,21−0,21×(2,3+1,9)=4,2×100,21−0,21×4,2=4,2×(100,21−0,21)=4,2×100=420=4,2×100,21−0,21×(2,3+1,9)=4,2×100,21−0,21×4,2=4,2×(100,21−0,21)=4,2×100=420
nhớ tick cho mik nhó
mn giup mik giai bai nay voi
a: AK<AQ
=>K nằm giữa A và Q
=>AK+KQ=AQ
=>KQ=1cm
b: AK và AC là hai tia đối nhau
=>A nằm giữa K và C
mà AK=AC
nen A là trung điểm của KC
c: BK=1,5+3=4,5cm>AQ
mn giup mk giai bai nay voi a
1 plays
2 are reading
3 sing
4 do - do, help
5 is teaching
7 visited
8 doesn't like
9 watch
10 gets - has - brushes - goes - has
11 played - was
12 met
13 are going to have
14 did - do , planted
15 didn't come
16 paint
17 taught
18 have never been
19 takes
20 have - had
21 received
22 is going to invite
23 is waiting
24 talked
25 is going to travel
26 went - didn't buy
27 doesn't learn - will fail
28 washes
29 will be - watches
30 will phone
2 are reading
3 sings
4 do - do - help
5 is teaching
7 visited
8 doesn't like
9 watch
10 gets - has
6. 10 brushes - goes
6. 30 has
11 played - was
12 met
13 will have
14 did - do - planted
15 didn't come
16 paint
17 taught
1 plays
2 are reading
3 sing
4 do - do, help
5 is teaching
7 visited
8 doesn't like
9 watch
10 gets - has - brushes - goes - has
11 played - was
12 met
13 are going to have
14 did - do , planted
15 didn't come
16 paint
17 taught
18 have never been
19 takes
20 have - had
21 received
22 is going to invite
23 is waiting
24 talked
25 is going to travel
26 went - didn't buy
27 doesn't learn - will fail
28 washes
29 will be - watches
30 will phone
giai giup em bai 3 hoac 4 a
Gọi chiều dài và chiều rộng ban đầu của mảnh đất lần lượt là x và y (x>y, y>6)
Vì chiều dài gấp 3 lần chiều rộng lên ta có PT: x=3y (1)
Nếu tăng chiều rộng 3m và giảm chiều dài 6m thì diện dích tăng thêm 18m2 nên ta có PT: (x-6)(y+3)=xy+18
⇔xy+3x-6y-18=18
⇔3x-6y=36 (2)
Từ (1) và (2) ta có HPT: \(\left\{{}\begin{matrix}x=3y\\3x-6y=36\end{matrix}\right.\)
⇔\(\left\{{}\begin{matrix}x=3y\\3\left(3y\right)-6y=36\end{matrix}\right.\)
⇔\(\left\{{}\begin{matrix}x=3y\\3y=36\end{matrix}\right.\)
⇔\(\left\{{}\begin{matrix}x=36\\y=12\end{matrix}\right.\)(TM)
Vậy chiều dài và chiều rộng ban đầu lần lượt là 36m và 12m
Xét tam giác ECD, theo tỉ số lượng giác trong tam giác vuông ta có:
tangECD=\(\dfrac{ED}{CD}=\dfrac{27}{37}=0,7\)
Mà góc ACB = góc ECD (đối đỉnh)
⇒tangACB=0,7
Xét tam giác ABC, theo tỉ số lượng giác trong tam giác vuông ta có:
AB=tangACB .BC
AB= 0,7.80=56(m)
MOI NGUOI OI GIUP EM CACH GIAI THOI GIAN BAI LA MA NHE:
VI DU( NAM 179 TCN THUOC ..... THE KY.......THIEN NIEN KY
NAM 1975 THUOC THE KY ..... THIEN NIEN KY
MN GIAI CHI TIET GIUP MK NHE
mn giup minh nhe
cam on cac ban da giup giai bai toan nay
Mn oi giup mk giai may bai nay nha!
Bai 1
1. A letter is read by Peter.
2. All the books in the shop were sold.
3. The words are explained by teacher today.
4. A new restaurant will be opened next week.
5. The lessons were prepared carefully.
1.read
2.were sold
3.are explain
4.will be
5.were prepared
Chuc ban hk tốt hơn!